Home / 20,987.10-28,953.07-12,032.55

Finding the Fourth Proportional to 20,987.10, 28,953.07 and 12,032.55

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Solution

The fourth proportional to 20,987.10, 28,953.07 and 12,032.55 is: 16,599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.10 : 28,953.07 = 12,032.55 : x
  2. Step 2: Convert to fraction form
    20,987.10/28,953.07 = 12,032.55/x
  3. Step 3: Cross multiply
    20,987.10x = 28,953.07 × 12,032.55
  4. Step 4: Simplify right side
    20,987.10x = 348,379,232.35
  5. Step 5: Solve for x
    x = 348,379,232.35/20,987.10
  6. Step 6: Final answer
    x = 16,599.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.